Improvement in sewing-machines



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JOSEPH BENNOR, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 HIM- SELEAND ABRAHAM REX, 0F SAME PLAGE.

Leiters Patent No. 99,1`38,*datccl January 25, 1870.

IMPROVEMENT IN SEWING-MACINE.

Tc all whom it may concern Be it known that I, JOSEPH Bannon, of Philadelphia, in the State of Pennsylvania, have invented certain new and useful Improvements i u Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact ldescription of the same, reference beinghad to the accompanying drawings, making a part of this specification, in which- Figure 1 represents a perspective view of the machine, with a section of the plate that covers the shuttle removed, to show the parts underneath it.

,Figure 2 represents a plan of the under side of the bed or table, and the mechanism there placed.

Figure 3 represents a section through the bed, and mechanism underneath it, taken at the red line :c x of fig. 2,- aud looking to the .left of said line.

Figure 4 represents, detached from the machine, an elevation of a portiou of the driving-mechanism not distinctly-seen in the other figures.

Similar letters of reference, where they occur in the separate figures, denote like parts of the machine, in all ofthe drawings.

My invention consists, rst, in the particular construction and operation of the cam, for allowing the shuttle to pass through the loop, both ou its forward and backward motion, that is to say, by turning the cam in either direction, togetherwith thecombination of the cam, as above stated, with the mechanism which moves the lever, by which the needle-bar is driven, and with the pitxnan and shuttle-driver, for moving the shuttle, and cam-plane connected to said driver.

It further consists in combining, with the shuttledriver, an inclined plane, for .the purpose of lifting the feed-bar, andthe cam which operates the feed.

It further consists 4in combining, with the bed or table, and a loose plate that covers the shuttle and its operative parts, the catch-spring, bolt, and lifter, for controlling said plate, both in holding and removing it. y,

To enable others skilled in the art to make and use my invention, I will proceed to describe the same, with reference to the drawings.

In bearings a a, at the rear of the bed or table A, is hung the shaft B, to whiohmotion may be given in any ofthe usual well-known ways of driving sewingmachines.

Upon the shaft B are arranged two cams, C D, by which regulated movements are given to thel needle, shuttle, and feed-mechanism, s'as to operate harmoniously in sewing a scam. 'y

Ou the bed or frame A is cast, or otherwise secured, the standard and arm E, for supporting the several parts that operate above the table, and as will be explained.

The cam O is of ordinary construction, and operates the cloth-feeding mechanism.

rPhe cam D performs `two duties, viz, it vibrates the needle-bar and needle, and operates the shuttle through the shuttle-driver.

The needle-arm F is pivoted to the standard E at b, and its short vertical arm below the pivot, as at c, fig. Q', has a friction-roller upon it, which runs in or against the cam-groove d, in or on the cam D, and Vthus said needle-arm gets its motion.

rlhe needle-bar G, supported in bearings e e ou the front end of the stationary arm E, is vibrated up and down by the arm F, and this bar carries the needle in the usual well-known way. 1

Upon a round rod or shaft, g, arranged in the line of the traverse of the shuttle, is placed the shuttledriver h, and to said shuttledriver is pivoted, as at t, I

a bent pitman, H, the bent-up end of .which is connec-ted to a wrist-pin, j, in the cam D, and by this-arrangement and mechanism the shuttle is driven.

The presser-foot k, and. its bar I, are arranged so as to be raised and lowered, and made adjustable in the usual well-known way.

The feed-mechanism is operated as follows:

The bar J' is pushed forward by the cam c, and is retracted by the recoil of the spring Z and a set-screw, m, having a coiled spring, n, around it, and the point of which set-screw presses against a spring, o, next the' cam, and moves said spring o to or from the beat of said cam, furnishes the means of regulating the extent (w'ithin certain limits) to which said bar J can be moved, andso adjusts or regulates the feed ofthe material that isbeing sewn, past the sewingmechauism` o'r point. i v

rllhe front end of the bar J has a hevelled plane, 19 on it, which works agaiusta shoulder, q, on the cross bar r, that has the roughened feed-surface s upon it, and bythis plane and shoulder the feed-bar, (and feedsurface) is operated in one directionfviz, that in which the cloth is fed along, whilst it is returned into position for 4the next feeding-motion by the recoil of the spring t, connected to it, and to the frame or table.

lhus two of the motions of the feeding-surface are given to it,.viz, its front and back motions.

The up motion of the feeding-surface is effected by a cam-plane, fu, on the shuttle-driver, coming against the projecting end c' of the `feed-bar lr, and raising it .up and the down motion is caused by the reaction of the spring t, which is so arranged as to draw said bar down, as well as backward, and thus the four feedmotions are attained.

The shuttle, though traversed by the shuttle-driver The plate or cover K, which covers the opening through which access is had to the shuttle, has a stud-catch, 1, on itsuuder side, which a. springbolt or keeper, 2, takes into, and thus holds said plate to the table.

The spring-bolt or keeper 2 has also upon it a projection, 3, which, when the bolt is drawn outward by the thumb-knob 4, strikes under the stud 1, and so raises up the plate, in which position it can be easily caught by the fingers, and removed, andthus the piece 2 serves as bolt, keeper, and cover-tripper, when it (the cover) is to be removed.

The motion given to the needle, through or by means of the cam-groove d, and the motion given to the shuttlc, through the pitman H, driven from a wrist-pin in or on the wheel D, in which the cam d is also made, are so timed and arranged, as that, whether said wheel, cam, and Wrist turn in one direction or the other, the needle and its loop will be in position to allow the shuttle to pass through said loop, whether so turned forward or backward, as it is termed.

Of course, the feed would not, as herein arranged, take place at the proper time for both of these motions, but, turning the machine in the reverse direction, would notso bring the needle orv shuttle together as to jam or break them.

This particularly-timed motion of needle and shuttle may be made available with a-doublenosed shuttle and proper feed, to sew by both of the traversing movements of the shuttle, as .the needle is down at both passes of the shuttle.

Having thus fully described the object and purpose of my invention,

What I claim therein as new, and 'desire to secure by Letters Patent, is-

Iu combination, the wheel D, the cam-groove d, for operating the needle through the needle-arm F, the crank or'wrist-pin j, for operating the shuttle, the shuttle-driver, and its cam-plane 'u, and the pitman H, all substantially as described.

Also, in combination with the described me ch an ism that moves the feeding-foot forward land back, the inclined plane u, on the shuttle-driver, for giving said foot its rising motion,'as and for the purpose described.

Also, in combination with 'the plate or cover K, the catch 1, the keeper 2, and projection 3, and thumbknob 4, for holding said plate when in place, and for l the ready removal of the same, substantially as described. y

JOSEPH BENN OR.

Witnesses:

W. O. LESLIE, EDWARD WILLIAMS. 

